Database System Concepts
Database System Concepts
7th Edition
ISBN: 9780078022159
Author: Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher: McGraw-Hill Education
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class PrintManager
def initialize
@queue = Queue.new
end
def queue_print_job (document)
@queue. enqueue (document)
end
def run
# Each time this Loop runs, we read the document
# at the front of the queue:
while @queue.read
#We dequeue the document and print it:
print (@queue.dequeue)
end
end
private
end
def print (document)
# Code to run the actual printer goes here.
# For demo purposes, we'll print to the terminal:
puts document
end
We can then utilize this class as follows:
print_manager PrintManager.new
print_manager.queue_print_job("First Document")
print_manager.queue_print_job ( "Second Document")
print_manager.queue_print_job("Third Document")
print_manager.run
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Transcribed Image Text:class PrintManager def initialize @queue = Queue.new end def queue_print_job (document) @queue. enqueue (document) end def run # Each time this Loop runs, we read the document # at the front of the queue: while @queue.read #We dequeue the document and print it: print (@queue.dequeue) end end private end def print (document) # Code to run the actual printer goes here. # For demo purposes, we'll print to the terminal: puts document end We can then utilize this class as follows: print_manager PrintManager.new print_manager.queue_print_job("First Document") print_manager.queue_print_job ( "Second Document") print_manager.queue_print_job("Third Document") print_manager.run
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